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Prunella vulgaris L. - Lamiaceae - 夏枯草 xia ku cao (chin.), (common) selfheal, heal-all, Gemeine Braunelle, Kleine Braunelle

Perennial herb, up to 30cm high, exact native range unknown, found in Europe, North Africa, Asia and North America; base much branched, purple-red; leaves lanceolate to oblong-lanceolate, up to 4cm long (var.lanceolata) or ovate-oblong to ovate, up to 6cm long (var.vulgaris); bracts purplish, broadly cordate; calyx campanulate, ca. 1cm; upper lip suboblate, subtruncate; lower lip narrower, teeth acuminate; corolla purplish or white, ca. 1.3cm. http://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=200020053

Prunella vulgaris L. subsp. asiatica (Nakai) H. Hara = Prunella asiatica Nakai
https://npgsweb.ars-grin.gov/gringlobal/taxonomydetail.aspx?id=459327

The spikes, Chinese drug name PhPRC 2010: Prunellae spica, Xiakucao, 夏枯草, are used to treat red or painful, swollen eyes, photophobia, visual disturbances and loss, head ache, sore and swollen throat, painful lumps, knots nodes at the neck and throat. PhEur 7.6 demands min. 0.12% ursolic acid and oleanic acid (not less than 75% ursolic acid), PhPRC 2010 demands min. 0.20% rosmarinic acid.
http://www.lfl.bayern.de/mam/cms07/publikationen/daten/merkblaetter/chinese_medicinal_plants__cultivated_bavaria_lfl-merkblatt.pdf

P.vulgaris as Brunella vulgaris; Lindman, C.A.M., Bilder ur Nordens Flora, vol.1 t.101 (1922-1926)
http://plantgenera.org/species.php?id_species=841357